RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 13:37:45 +00:00
Code Issues Activity Actions

LibSQL+SQLServer: Return the new Result class from statement executions

Browse source 
We can now TRY anything that returns a SQL::Result or an AK::Error.
This commit is contained in:
Timothy Flynn 2022-02-09 15:57:57 -05:00 • committed by Linus Groh
parent d9055de7ea
commit 6620f19979
11 changed files with 337 additions and 337 deletions
Download patch file Download diff file Expand all files Collapse all files

101
Userland/Libraries/LibSQL/AST/Select.cpp
View file

@ -13,65 +13,67 @@
namespace SQL::AST {
RefPtr<SQLResult> Select::execute(ExecutionContext& context) const
Result Select::execute(ExecutionContext& context) const
{
NonnullRefPtrVector<ResultColumn> columns;
auto const& result_column_list = this->result_column_list();
VERIFY(!result_column_list.is_empty());
for (auto& table_descriptor : table_or_subquery_list()) {
if (!table_descriptor.is_table())
return SQLResult::construct(SQLCommand::Select, SQLErrorCode::NotYetImplemented, "Sub-selects are not yet implemented");
auto table_def_or_error = context.database->get_table(table_descriptor.schema_name(), table_descriptor.table_name());
if (table_def_or_error.is_error())
return SQLResult::construct(SQLCommand::Select, SQLErrorCode::InternalError, table_def_or_error.error());
auto table = table_def_or_error.value();
if (!table) {
return SQLResult::construct(SQLCommand::Select, SQLErrorCode::TableDoesNotExist, table_descriptor.table_name());
}
return { SQLCommand::Select, SQLErrorCode::NotYetImplemented, "Sub-selects are not yet implemented"sv };
if (result_column_list().size() == 1 && result_column_list()[0].type() == ResultType::All) {
for (auto& col : table->columns()) {
auto table_def = TRY(context.database->get_table(table_descriptor.schema_name(), table_descriptor.table_name()));
if (!table_def)
return { SQLCommand::Select, SQLErrorCode::TableDoesNotExist, table_descriptor.table_name() };
if (result_column_list.size() == 1 && result_column_list[0].type() == ResultType::All) {
for (auto& col : table_def->columns()) {
columns.append(
create_ast_node<ResultColumn>(
create_ast_node<ColumnNameExpression>(table->parent()->name(), table->name(), col.name()),
create_ast_node<ColumnNameExpression>(table_def->parent()->name(), table_def->name(), col.name()),
""));
}
}
}
VERIFY(!result_column_list().is_empty());
if (result_column_list().size() != 1 || result_column_list()[0].type() != ResultType::All) {
for (auto& col : result_column_list()) {
if (col.type() == ResultType::All)
if (result_column_list.size() != 1 || result_column_list[0].type() != ResultType::All) {
for (auto& col : result_column_list) {
if (col.type() == ResultType::All) {
// FIXME can have '*' for example in conjunction with computed columns
return SQLResult::construct(SQL::SQLCommand::Select, SQLErrorCode::SyntaxError, "*");
return { SQLCommand::Select, SQLErrorCode::SyntaxError, "*"sv };
}
columns.append(col);
}
}
context.result = SQLResult::construct();
AK::NonnullRefPtr<TupleDescriptor> descriptor = AK::adopt_ref(*new TupleDescriptor);
context.result = Result { SQLCommand::Select };
auto descriptor = adopt_ref(*new TupleDescriptor);
Tuple tuple(descriptor);
Vector<Tuple> rows;
descriptor->empend("__unity__");
descriptor->empend("__unity__"sv);
tuple.append(Value(SQLType::Boolean, true));
rows.append(tuple);
for (auto& table_descriptor : table_or_subquery_list()) {
if (!table_descriptor.is_table())
return SQLResult::construct(SQLCommand::Select, SQLErrorCode::NotYetImplemented, "Sub-selects are not yet implemented");
auto table_def_or_error = context.database->get_table(table_descriptor.schema_name(), table_descriptor.table_name());
if (table_def_or_error.is_error())
return SQLResult::construct(SQLCommand::Select, SQLErrorCode::InternalError, table_def_or_error.error());
auto table = table_def_or_error.value();
if (table->num_columns() == 0)
return { SQLCommand::Select, SQLErrorCode::NotYetImplemented, "Sub-selects are not yet implemented"sv };
auto table_def = TRY(context.database->get_table(table_descriptor.schema_name(), table_descriptor.table_name()));
if (table_def->num_columns() == 0)
continue;
auto old_descriptor_size = descriptor->size();
descriptor->extend(table->to_tuple_descriptor());
descriptor->extend(table_def->to_tuple_descriptor());
for (auto cartesian_row = rows.first(); cartesian_row.size() == old_descriptor_size; cartesian_row = rows.first()) {
rows.remove(0);
auto table_rows_or_error = context.database->select_all(*table);
if (table_rows_or_error.is_error())
return SQLResult::construct(SQLCommand::Select, SQLErrorCode::InternalError, table_rows_or_error.error());
for (auto& table_row : table_rows_or_error.value()) {
auto table_rows = TRY(context.database->select_all(*table_def));
for (auto& table_row : table_rows) {
auto new_row = cartesian_row;
new_row.extend(table_row);
rows.append(new_row);
@ -80,7 +82,7 @@ RefPtr<SQLResult> Select::execute(ExecutionContext& context) const
}
bool has_ordering { false };
AK::NonnullRefPtr<TupleDescriptor> sort_descriptor = AK::adopt_ref(*new TupleDescriptor);
auto sort_descriptor = adopt_ref(*new TupleDescriptor);
for (auto& term : m_ordering_term_list) {
sort_descriptor->append(TupleElementDescriptor { .order = term.order() });
has_ordering = true;
@ -89,18 +91,21 @@ RefPtr<SQLResult> Select::execute(ExecutionContext& context) const
for (auto& row : rows) {
context.current_row = &row;
if (where_clause()) {
auto where_result = where_clause()->evaluate(context);
if (context.result->has_error())
return context.result;
if (context.result->is_error())
return context.result.release_value();
if (!where_result)
continue;
}
tuple.clear();
for (auto& col : columns) {
auto value = col.expression()->evaluate(context);
if (context.result->has_error())
return context.result;
if (context.result->is_error())
return context.result.release_value();
tuple.append(value);
}
@ -108,39 +113,43 @@ RefPtr<SQLResult> Select::execute(ExecutionContext& context) const
sort_key.clear();
for (auto& term : m_ordering_term_list) {
auto value = term.expression()->evaluate(context);
if (context.result->has_error())
return context.result;
if (context.result->is_error())
return context.result.release_value();
sort_key.append(value);
}
}
context.result->insert(tuple, sort_key);
}
if (m_limit_clause != nullptr) {
size_t limit_value = NumericLimits<size_t>::max();
size_t offset_value = 0;
auto limit = m_limit_clause->limit_expression()->evaluate(context);
if (!limit.is_null()) {
auto limit_value_maybe = limit.to_u32();
if (!limit_value_maybe.has_value()) {
return SQLResult::construct(SQLCommand::Select, SQLErrorCode::SyntaxError, "LIMIT clause must evaluate to an integer value");
}
if (!limit_value_maybe.has_value())
return { SQLCommand::Select, SQLErrorCode::SyntaxError, "LIMIT clause must evaluate to an integer value"sv };
limit_value = limit_value_maybe.value();
}
size_t offset_value = 0;
if (m_limit_clause->offset_expression() != nullptr) {
auto offset = m_limit_clause->offset_expression()->evaluate(context);
if (!offset.is_null()) {
auto offset_value_maybe = offset.to_u32();
if (!offset_value_maybe.has_value()) {
return SQLResult::construct(SQLCommand::Select, SQLErrorCode::SyntaxError, "OFFSET clause must evaluate to an integer value");
}
if (!offset_value_maybe.has_value())
return { SQLCommand::Select, SQLErrorCode::SyntaxError, "OFFSET clause must evaluate to an integer value"sv };
offset_value = offset_value_maybe.value();
}
}
context.result->limit(offset_value, limit_value);
}
return context.result;
return context.result.release_value();
}
}